The Siemens 3VA1050-3ED32-0CC0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — three poles, rated 50 A continuously at 40 °C, and derated to 45 A at 70 °C. That thermal curve means it holds steady up to 55 °C before the first amp drops off: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, 45 A at 70 °C.
Breaking capacity — the voltage-dependent story
Interrupting rating drops sharply as system voltage climbs: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. The 75.6 kA at 240 V gives plenty of headroom for North American 240/120 V split-phase or 240 V delta services.
Width 76.2 mm (3 in), height 130 mm (5.12 in), depth 70 mm (2.76 in). The two auxiliary switches HQ are pre-installed; no separate aux kit to order.